Electric control for phonographs



OCL 21, 1952 L. J. ANDRES 2,614,674

ELECTRIC CONTROL FCR PHoNoCRARHs Filed Jan. 1e, 1947 27./ f "y, 7 J3 y?)*Patentedcom21; 1952 'I c 2,614,674; Y. s @ELECTRIC CONTROL lrolt'rHooeRA'Pi-rs' j f* Illinois My present"inventiorrrelates 'ingeneral'to' electi control apparatus .for .automatic 'coin-oper- `ated'phonograph's "'or'smilar devices` and more particularlyto an'electro-'magnetic selecting sys'- intlfiereior' possessingthe'featuresof improveniniherenafter pointed cui.'v

" cieirigseieciingsystems previous i'oihis invention have 'generally'been subject' to/ unauthorized 'or improper operation in various Ways,'such 'as by manipulating'thef usual push Vbuttons `in an unintendedmanner or setting up other conditions VWhiclfi-.would ymake itpos'sibleto cause operation of 'the-*device v without insertion of proper orsufcientcoins. `Many attempts have been made" to provide' protective'devicesv invone kor more o f the circuits to overcome these defects,

but the addedfcomplexity involved often resulted `i VVin thev,mechanicalfailure of the device in Inormal [operation 'f 'Ihe rpresent' inventionsolves this p'roblemina simple -and'direct manner'and the 'be'cheat-proof 'and' fool-#proof in operation regardlessof the -seq'lenoeor manner inrwhich the Ic introls aremanipulated.'

A piincipai' Qbjectofiiie invention is 'the 'pievi-` selected given-n'mberv of i the controlling electro-v magnetsfmay beenergized upon thedeposit of a corresponding number of coins. i

Another object is the prcvision'in siich an a'p- I paratus of means'r*forr applying an 'electric 'puls/e o fffshortduration to saidelectro-magnets when they arey to lbe energized, controlled by asirnpie'tijnevdelay relay orlil'iedevice.

`Awful-ther:objectjisthe provision of an electro' magnetic `computing`device whereby the vprede` 'termined value of coins inserted mayberegistered ifi; combination with 12.631157 wmf-@byA e 'selected groupof'` electro-magnetic devices, corresponding with thevalue of the-coinsinserted,

maybe energized.

nother Lobject, which is important from the standpoint ofweconomy andsimplicity, .is theprovision", ofvmeansvvhereby a Vgiven number ofcontrolsWtches-will operate a like" given number of electro-magnets withnot more than half of .thatnumber'of'conductors running from the said"rsiwitchesto the said electro-magnets'.` Other objectsfand advantagesof the invention Will.r be apparent'A from the following'specifioation.

and drawingsjin-:Which:

` KwFig.l l is a..diag'rammatic View of the'circut landits. associatedelements; and f in" aia' drawings ilnavesi'itwii, wenn@ @and lineV,enclosuregb; y; a conventional` add-'subtract unit; including Vavcredit-wheel flfmovable inflone direction, one step'vforfeach, coindepositec1 ,jandv inthe other direction', `one step foreach; recordplayed' 'or 'eachunit of servicefrenderedi The wheel' is urged inthedirection'lshown bythe y arrow by a spring 2, and a -pivotally mountedescap'ement lever' 3 is lpositioned -toalternately vengage the teeth of.said Wheeli- A spring -fholds said escapement lever normally in vitsifrest' posi;- tion shown in thedrawing. Y c

The primary of 'a-transformer Fris connected .to p'ow'er linesl'Ll "andL2 and a low"-voltage secondaryjof said transformer is utilized toisup.-ply the circuit with electric energy through rpower conductors E andrl."t `A conventional? coin' vswitch 8, 9,*. shown 1 in :a

dotted' line 'enclosure a; isl c'i'n'nnected.v to: faecoinilapp'ara'tusr providedthereby' has been found to y v'sior'r ofelectro-magnetic means whereby'pnly a.A

" additional teeth corresponding4 to thenumbr'" of magnet IU: by'aconductorrlzZ, 13 and-ftothewline 'l by a conductor 14.1: Said.-magnetis connected by a conductor ll .with thev 1in'e'6.liIt'fvi/illvbe apparent that th'gdeposit of a coinv I5Wil1 mo-kmentarily close the normally open switch 8 r9'and' energizesthe -magnetf'l0 Lto 'attract :the 'f escapement lever Sand cause the'zwheel l toadvance 4onetooth, and thatthed'eposit of vvadditional-coins will cause`said vWheel 'to advance `a number. :of

suchvooinsdeposited.

v`YA?pivotally mounted restoring'r leve'r 4I 6; having a pawl Hpivotally attached tooneend thereof in''oper'ativ'erelati'on tothefteeth of the whel I, is normally held` out? of engagement lwith saidteeth by. aspring 18,1y With 'a" tail part oflthe'fpawl restinga'gainst'a fixed'stop I9'. An electromagnet or solenoid.v 2B havingacore 2 I'to whichthelever I6 lis pivotally attached will move the'leve'rIB in'a downward "direction when 'saidfmagretfis energized and` the pullthereof overcomes y'ftlfe i -action of the spring I 8; causing thepawl""|1`='to y engage an adjacent tooth von the Wheel When the magnetzu ieee-energized, the sprin'gf ifs-will 'return the lever` I6 causingthepawl VIfllto move the wheel fi a dist'ar'icev equal to onetooth'in the direction; `,Opposite that Y indicated? by thearrcw. Theescapement means on thelever 3 Willreta'in the wheel 'inf the restoredposition.

A switch 22,v 23 is positioned io be heifidpeii-by said lever` I6 whenit is in its normal re'stfposition and to automatically closewhenffsa'idlever is loWered as Ajust'described.y i "Vf if 1Arela'ycompifising electro-magnetsiill' an "25, disposed a)at rightangles tofeachother",l and'-'1ntei" iocking-z armatures ireland-:f 21;is' piviuafrr controlling the magnet 20. Said armatures are retained intheir normal inoperative position, shown in Fig. 1, by springs 28 and29, respectively, and a normally open switch 36, 3i is so positionedwithrespect to the armature 21 that it will be closed when the magnet 24is energized and attracts the armature 26, thereby releasing `saidarmature`21 from the armature 26 and permitting it to be moved under theinfluence of its spring 29 to switch-closing position;

A plurality of electro-magnets, shown in two groups, marked,respectively,` 32 and 33,repre sent the controlling elements in theAdevice to be operated, as, for example, selector mechanism of anautomatic phonograph, and are shown within a dotted line enclosure c.

A plurality of push button-operated singlepole, double-throw switchesarranged in two groups, the switches of one group each comprisingelements 34, 35, 36 and those of the other `group' eachcomprisingelements 31,38,v 39, are

`shown in a' dotted line enclosure d, these ytwo groups of-Aswitchescorresponding, respectively, to the twogroups of Amagnets 32 and 33. Thecentral poles, 35 and 38,-respectively, of these switches are operatedby individual push butvtonsrepresented in the drawings merely by arrows.

f Al bar 4Ull,which isoperated by depression of any one of thepush-buttons of the first group 'ofv'switches serves to'close a switch 4I, 42, thereby energizing an electro-magnet 43 of a switch- 'ingirelaywhichfincludes 'a two-position armature'switch 44, `45, 46.1 Blades 44and 460i said Iswitch are n'ormallyheldVv in contact by a spring 41.

A master switch 48, 49 is positioned adjacent the credit wheel Iand iscontrolled by a pin 59 :on said wheel. .The .bladesY of 'said switch'arebiased toward closed position and the pin 5i) vliold'slrthe switch blade49 out of contact with blade 48 when .the wheel is in its initialposition.

A.ztime-de1aywrelay. comprising an electrom'agne't 51I-and apair' ofswitch blades 52, 53,

which are normally held open by a springv 54, is .connected to/operate'the electro-magnet 25 of the above-described interlockingl relayv inmanner tov be hereinafter explained..

' Theimaster switch 48," 49 is in the power. line 6 and the latter runsto switch blades 3.I, 53 and 42 and tothe blade 35 of the rst of thepush button switches 34, 35, 36.

r Blade 45 of the switch 44, 45, 46 is connected to.v one 'terminal ofeach ofA the'magnets 32 bya l'conductor 56 and blade 46 of said switchisconnected to one terminal of eachof the magnets 33 by a conductor 51.

Switch bladel 30 is connected to the second terminal of magnet byconductor 58; switch blade 52 is connected to the second terminal of`magnet by conductor 59; switch blade 23 is connected tothe secondterminal of magnet 5I `61a and the last of the second series of switches4 is connected withthe conductor 6I by a conductor B'b.

If the operator depresses blade 38 of the rst switch of the second groupto energize the rst magnet of the second group, the series circuit tothe remaining switches of the secondr group,

which is normally maintained through the con- I ductors 6l, willi bebrokenv and, by :virtue of the normally closed'svvitch 1I, 12, aconductor 55h,

a conductor 55C, and the electro-magnet 24 to the power line I. v

Simultaneously with the energizing of the first magnet 33, the magnet 24will attract itsi armature 26 and release armature 2'I. which will thenclose the. switch 30, 3 I This will energize magnet 29 which will thenpull arm I6 to itslowermostA position where it willv remain luntilf themagnet 29 is de-energized.r vIn moving to said lowermost position thelever I5, through an arm 'I3 depending therefronn will-depress theVswitch blade l2, thus opening'the circuit to the magnets 32 and 33 andpreventing :any possibility cfa secondone of said magnets beingenergized until the restoring operation has been completed and the armI6v has returned toits upper position.

When the push button-operatedblade 38 isereleased, said blade 38 andtheblade 39 will complete a circuit through conductors-6l, 6'Ib and 6Iand through the then closed switch 22, 23 to energize the time delayrelay -magnet 5I thereby closing. the switch 52, 53. .This energizes-there-V storing'magnet 25 which thereupon returnsithe armature 2l toposition .to;.interlock. with. the

armature26 which has previously been released by the magnet 24'as abovedescribed. The switch 39, 3I..wi1l .then openand de-energize-themagnetvZ, permitting the spring I8 toA return lever I6 to its normalrest position.. `During thismovement the pawl I 'I willmovethe. wheelLone step in the direction oppositethat indicated -by the arrow on saidwheel. l

When the arm I6 is thus returned to its normalposition thevswitch 22, 23will beopened, thereby de-energizing magnet 5I and opening switch 52, 53to deeenergize-"thev restoring magnet 25. Under these circumstances allofthe apparatus is in the position shown in Fig. 1 except that theswitch yIIB, 49 will remain closed `if more than one coinhas beeninserted, as the pin. 50 will then be one tooth or more away fromcontact with the switch-blade 49. j.

If the operator depressesvbladef35 of one of the switches 34, 35, 36ofthe rst groupthe bar 49 .will be moved and caused to close switch 4I,42,

magnet 32 corresponding to theswitch whichli'as been operated. Since themagnets 32 arerconnected through conductor 56, switch 45-'44,'con'-ductors 55 and 55a, switch 1I, 'I2 and conductors 5519 and 55e tothemagnet124, and through the latter to the power'line 1, thegmagnetf24;will

' previously described.

germer Wliemthe#wheell ret-urns to its initiall position the pin Dthereonwillcontact `the blade 49 of the master switch"`48',49"and'breakits contactwith the :blade 48; f'thus "completing-1 a cyclelofoperation.

While a blade--38gor-.n35fas vthecaserinight be, iS in depressedposition the series circuit through the conductors 61 is brokenth'uspreventing the"- ne?? 3901 anofmerI switchw Furthermor' th e mees/witchy1|=,`-'12-ssanincident ing operation renders it impossible to maintaina second circuit during such operation by manipulation of push buttons.It therefore will be apparent that an operator can energize only suchnumber of the magnets 32 and 33 as correspond to the number of coinsdeposited; or, in other words, that it is impossible to effectivelyenergize more than one magnet upon deposit of a coin of Vsingle unitvalue, regardless of how the push buttons or any other part of themechanism may be manipulated.

As above indicated it is also an important feature of the invention thatonly half the number of conductors 64 are required as the number ofmagnets 32 and 33 to be energized. This is pare ticularly advantageouswhere the switches 34-36 and 31-39 are located at a distance from themagnets, as is required in the remote control of phonograph mechanisms.

It will also be apparent that, utilizing the alternate means ofswitching shown in Fig. 2, the relay 43 and its associated switches4I-42, and

44-45--46 may be eliminated by the use of switches such as that shown at68, 69, l0, and that, with this arrangement, more than two groups ofmagnets may be operated fromcorresponding groups of push buttonswitches, provided multiples of the double throw switches 68, 69, 10 areutilized in connection with each group of push button-operated switches.For example, four pluralities of electro-magnets'may be energized fromfour pluralities of push button switches, utilizing only a singlecorresponding plurality of connecting conductors.

Ordinarily if the switch 22, 23 were accurately adjusted it could beutilized to directly energize the restoring magnet 25. However, it ispossible that the switch blades 30, 3l may not stay closed y for a timesuiciently long to permit the magnet 20 tomove the wheel restoring leverI6 its full range. Hence, it has been found that the insertion of thetime delay relay which includes magnet5l and switch blades 52, 53 willin all condi- .tions of operation permit the lever I6 to move its fullrange'. With this simple construction an electric impulse of shortduration may be applied to the magnet 32 or 33 to be operated, as by aquick operation of one of the push buttons,

and the magnet 20 will nevertheless remain energized long enough toperform its function.

The foregoing detailed description has been lgiven for clearness ofunderstanding only, and

no. unnecessary limitations should be understood therefrom, but theappended claims should beV mori connections onefrunningfroreach said.and second?plurali-tyA of ele'ctromagiresto-saidl* electricswtich'jme'ans', 'the-remaining' t r'riiinalfo the electron-1'agnets'f"I fs'aidlrstpluralit being c'ir'ir'iecjteel'l' withf-'a *corresponding:remain mg terminarV pfeaciif off they feietremaglnetsffo theseeoiidpiuraiity,' each switch/.inthe erst piu spnciig "switchfiffftie'f'second pluraiity of switches, conductors running, respectively, fromeach electromagnet of said first plurality of electromagnets to thecorresponding switch of said rst plurality ofvswitches, and means forconnecting the switches of the second plurality to said tric switchescorresponding in number and order to said electromagnets, electricswitching means responsive to the initial movement of any switch of saidfirst group, one of the terminals of each electromagnet in they firstgroup being connected to a' common conductor leading to one contact ofsaid switching means and one of the terminals of each electromagnet ofthe other group being connected to a common conductor leading to anothercontact of said switching means, the remaining terminal of eachelectromagnet in said first group of electromagnets being connected by aseparate independent conductor tothe remaining terminal of each saidelectromagnet in the said second group, separate conductors,respectively, connecting said electromagnet of said first group witheach switch of said first group, branch conductors connecting saidlast-mentioned conductors, respectively, with successive switches of thesecond group, thereby connecting each `electromagnet of said Vsecondgroup with its corresponding switch in the second group, a source ofelectrical energy, circuit means connecting said electric switches andsaid switching means and said source of electric energy, and

means whereby the manual selective initial operationlof any of theswitches ofthe first group will vfirst operate said switching means topartially complete an electric circuit to said rst group ofelectromagnets and whereby the further movement of vsaid selected switchwill energize, through a portion of said circuit means, anelectromagnety corresponding with the said switch, and whereby theselective operation of any switch in said second group switches willestablish, through a corresponding separate conductor, a circuit t0 i anelectromagnet of the second group corresponding with said switch.

3; In a selecting system for coin-operated phonographs, aseries ofelectromagnets to be selectively energized, a series of switchesselectively operable to energize said magnets, a source of power, anadd-subtract coin control unit for connecting said switches and magnetsto said source of power so that subsequent operation of selectedswitches will energize corresponding magnets, actuatingA means and acoin-controlled escapement device for causing entering operations ofsaid add-subtract unit, said switches being electrically interconnectedthrough the operatable element thereof whereby operation ofone-ofsaidswitcliesy L disconnects the othersfrom said sourceof power, andmeans controlled by the return movement of the actuated switch 'forVcausing a restoring op erationgof said add-subtract unit, saidlast-mentioned` means including an actuator for said unit, a solenoidfor controlling the operation of said actuator; Va, switch forcontrolling the supply of current to. said solenoid, a relay comprisinga switchfopening magnet, Va switch-closing magnet and` interlockingarmatures controlled thereby, l and a vtime delay relay, including aswitch and a y controlling magnet therefor controlledby operation ofsaid selectively-operable switches, for controlling `the supplyv ofcurrent to said switchopening magnet to therebycause completion ofsaid'restorng operation even though the electric.

impulse resultingfrom actuation of said switch should be of too briefduration to otherwise coml plete such operation. f

REFERENCES CITED The following references'are of record file of thispatent:

McCauley Jan. 24, V1950 LLOYD J. ANDRES'- in the

